公司里的机器突然不能git clone了。
古怪。报错信息如下：
git clone https://github.com/httperf/httperf
Cloning into 'httperf'...
fatal: unable to access 'https://github.com/httperf/httperf/': SSL connect error
见了鬼了，前几天还用的好好的，打开调试看看：
$> GIT_CURL_VERBOSE=1 git clone https://github.com/httperf/httperf
Cloning into 'httperf'...
* Couldn't find host github.com in the .netrc file; using defaults
* About to connect() to github.com port 443 (#0)
* Trying 192.30.253.113... * Connected to github.com (192.30.253.113) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
* CAfile: /etc/pki/tls/certs/ca-bundle.crt
CApath: none
* NSS error -12190
* Error in TLS handshake, trying SSLv3...
> GET /httperf/httperf/info/refs?service=git-upload-pack HTTP/1.1
User-Agent: git/2.4.8
Host: github.com
Accept: */*
Accept-Encoding: gzip
Accept-Language: en-US, *;q=0.9
Pragma: no-cache
* Connection died, retrying a fresh connect
* Expire cleared
* Closing connection #0
* Issue another request to this URL: 'https://github.com/httperf/httperf/info/refs?service=git-upload-pack'
* Couldn't find host github.com in the .netrc file; using defaults
* About to connect() to github.com port 443 (#0)
* Trying 192.30.253.113... * Connected to github.com (192.30.253.113) port 443 (#0)
* TLS disabled due to previous handshake failure
* CAfile: /etc/pki/tls/certs/ca-bundle.crt
CApath: none
* NSS error -12286
* Expire cleared
* Closing connection #0
fatal: unable to access 'https://github.com/httperf/httperf/': SSL connect error
无妄之灾啊，SSL错误
没办法，更新一下nss吧
yum update -y nss curl
就好了。